Species
Browsing 1,299 species. Use the filters below to narrow down.
Blacktail Catfish
FishHemibagrus wyckii
A river giant that sees humans as a threat. And acts on it.
Black-throated Eartheater
FishGeophagus brachybranchus
A sand-sifting eartheater with elaborate mouthbrooding parental care and a surprisingly gentle nature.
Blacktop Catfish
FishCorydoras acutus
A sharp-snouted little armored catfish with a bold black dorsal spot.
Black Venezuelan Corydoras (Tank-Bred)
FishCorydoras schultzei
A rare, captive-bred cory with deep black coloration and charming schooling behavior.
Black-winged Hatchetfish
FishCarnegiella marthae
A tiny, deep-chested surface dweller that will absolutely find any gap in your lid.
Bladder Snail
InvertPhysella acuta
The unstoppable little snail that thrives where others fail.
Bleeding Heart Tetra
FishHyphessobrycon socolofi
The bleeding heart tetra rewards patient keepers with spectacular male rivalry displays.
Blind Cave Loach
FishNemacheilus troglocataractus
A blind, cave-dwelling loach from a single Thai cave system.
Blind Cave Loach
FishSchistura jarutanini
A blind cave loach from Thailand that science knows from just 22 specimens.
Blonde Bulldog Pleco
FishChaetostoma cf thomsoni
The most common rubbernose pleco in the hobby, and endlessly misidentified.
Blue Acara
FishAndinoacara pulcher
A forgiving cichlid with real personality, perfect for community tanks with medium-sized fish.
Blueback Blue-eye
FishPseudomugil cyanodorsalis
A tiny blue-backed rainbowfish relative from Australia's brackish mangrove creeks.
Bluebanded Angelfish
FishPygoplites diacanthus
One of the reef's most recognizable angels, and one of its trickiest to keep.
Blueberry Tetra
FishHyphessobrycon wada
A tiny tetra with a purple-blue body and vivid orange fins that deepen with age.
Blue Caribe
FishSerrasalmus altuvei
A rare, solitary piranha relative that's harder to identify than to keep.
Blue Cichlid
FishNanochromis nudiceps
A compact Congo cichlid with a violet belly and real personality in a small package.
Blue Crayfish
InvertProcambarus alleni
Florida's boldest crustacean, in an almost unreal shade of blue.
Blue danio
FishDanio kerri
A powder-blue schooling gem from the Malay Peninsula that's rarely seen but easy to keep.
Blue Devil
FishChrysiptera cyanea
Vivid blue and boldly territorial, this tiny fish punches well above its weight.
Blue-eyed Catfish
FishAmblydoras nauticus
A hardy little catfish that talks in the dark and rarely shows its face by day.
Bluefin Notho
FishNothobranchius rachovii
A fish that lives fast, dies young, and leaves spectacular eggs behind.
Blue Flasher-wrasse
FishParacheilinus cyaneus
A reef-dwelling wrasse that sleeps wrapped in its own slime cocoon every night.
Bluehead Wrasse
FishThalassoma amblycephalum
A reef-dwelling wrasse with bold color phases and a peaceful community nature.
Blue Hillstream Trout
FishOpsarius bernatziki
A fast, bold hillstream schooler with vivid blue flank bars and serious attitude.
Blue Kumu
FishParupeneus cyclostomus
A reef-flat hunter that uses whisker-like barbels to sniff out hidden prey.
Blue Leg Hermit Crab
InvertClibanarius tricolor
A tiny, tireless reef cleaner with vivid blue legs and a big appetite for algae.
Blue Leg Poso Shrimp
InvertCaridina cf babaulti
A delicate little shrimp from an ancient Indonesian lake with vivid blue legs.
Blue Linckia Starfish
InvertLinckia laevigata
A vivid blue star from Indo-Pacific reefs, built for the patient reef keeper.
Blue-lined Rasbora
FishTrigonopoma gracile
A delicate blackwater rasbora with variable color forms from Borneo's forest streams.
Blue-lined Sea Bream
FishSymphorichthys spilurus
A bold reef-associated snapper that grows into a true centerpiece fish.
Blue Lyretail
FishFundulopanchax gardneri gardneri
A hardy, colorful killifish that's genuinely beginner-friendly and easy to breed.
Blue Mushroom Anemone
CoralRhodactis inchoata
A beginner-friendly mushroom coral with an unusually rich blue coloration.
Blue Neon Sheatfish
FishKryptopterus apogon
A massive river predator sometimes sold to unsuspecting buyers as a cute juvenile.
Bluespine Unicornfish
FishNaso unicornis
A true horn-nosed giant that demands a serious reef setup to thrive.
Bluespotted Jawfish
FishOpistognathus rosenblatti
A colonial burrower that tucks itself in every night like clockwork.
Blue-spotted Mudskipper
FishBoleophthalmus boddarti
A fish that walks on mud and breathes air at the tide's edge.